Note 4 - Investments (Details Textual) - USD ($)	1 Months Ended	3 Months Ended
	Apr. 30, 2025	Mar. 31, 2025	Dec. 31, 2024	Mar. 31, 2024
Equity Method Investments		$ 3,007,000
Gain (Loss) on Investments		516,000		$ 239,000
Payments to Acquire Equity Method Investments		84,000
Equity Method Investment, Other-than-Temporary Impairment		$ 0
Privately Held Company Providing Supply Chain and Receivables Financing [Member]
Subsidiary, Ownership Percentage, Noncontrolling Owner		12.50%
Privatelyheld Technology Company and Program Manager With Ties To The Fintech Industry [Member]
Subsidiary, Ownership Percentage, Noncontrolling Owner		3.40%
Subsequent Event [Member]
Equity Method Investment, Amount of Funding Round	$ 8,500,000
Privately-Held Identity and Professional Services Company With Ties to the FinTech Industry [Member]
Equity Method Investment, Ownership Percentage		24.50%	20.20%
Payments to Acquire Equity Method Investments			$ 300,000
Transfer Advisory Business to New Entity [Member]
Equity Method Investment, Difference Between Carrying Amount and Underlying Equity		$ 3,100,000
Privately Held Company Providing Supply Chain and Receivables Financing [Member]
Equity Securities without Readily Determinable Fair Value, Amount		182,000
Privatelyheld Technology Company and Program Manager With Ties To The Fintech Industry [Member]
Equity Securities without Readily Determinable Fair Value, Amount		$ 155,000